<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="test.css" type="text/css">
</head>
<body>
<div id="father">
<div class="layer1"><img src="1.png"></div>
<div class="layer3"><img src="3.png"></div>
<div class="layer4"><img src="4.png"></div>
<div class="layer5"><img src="5.png"></div>
</div>
</body>
</html>